Abstract: An apparatus for accelerated weathering testing specimens including discharge lamps as a concentrated light source for accelerating the deterioration of color, composition and/or structure of test specimens. Improved control calibration structures and methods of operation are also included. The test module to monitor the weathering test process from an improved location, detecting irradiance in the manner in which the specimens are exposed to such irradiance. The test modules are mounted in a pocket formed within the door for the test chamber such that the sensitive electronics of the modules are not exposed to the harsh environment within the test chamber, resulting in an exceptionally stable signal.

Abstract: An apparatus for accelerated weathering testing specimens including discharge lamps as a concentrated light source for accelerating the deterioration of color, composition and/or structure of test specimens. Improved control calibration structures and methods of operation are also included. The test module to monitor the weathering test process from an improved location, detecting irradiance in the manner in which the specimens are exposed to such irradiance. The test modules are mounted in a pocket formed within the door for the test chamber such that the sensitive electronics of the modules are not exposed to the harsh environment within the test chamber, resulting in an exceptionally stable signal.

Abstract: A method and apparatus for detecting for detecting an object within a radiating beam of a radiating source. The method receives reflected and radiated radiation directly from the object to provide a radiation signal. The method then processes the radiation signal to provide a control to the radiating source. A concomitant apparatus comprising a detector and a control circuit is provided. The detector receives reflected and radiated radiation directly from the object and provides a radiation signal indicative of the reflected and radiated radiation received from the object. The control circuit, coupled to the detector, processes the provided radiation signal to provide a control signal to the radiating source.